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vfs: have do_sys_truncate retry once on an ESTALE error

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Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Jeff Layton 2012-12-11 12:10:11 -05:00 committed by Al Viro
parent c6a9428401
commit 48f7530d3f
1 changed files with 7 additions and 1 deletions
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8
fs/open.c
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@ -115,17 +115,23 @@ EXPORT_SYMBOL_GPL(vfs_truncate);
static long do_sys_truncate(const char __user *pathname, loff_t length) static long do_sys_truncate(const char __user *pathname, loff_t length)
{ {
unsigned int lookup_flags = LOOKUP_FOLLOW;
struct path path; struct path path;
int error; int error;
if (length < 0) /* sorry, but loff_t says... */ if (length < 0) /* sorry, but loff_t says... */
return -EINVAL; return -EINVAL;
error = user_path(pathname, &path); retry:
error = user_path_at(AT_FDCWD, pathname, lookup_flags, &path);
if (!error) { if (!error) {
error = vfs_truncate(&path, length); error = vfs_truncate(&path, length);
path_put(&path); path_put(&path);
} }
if (retry_estale(error, lookup_flags)) {
lookup_flags |= LOOKUP_REVAL;
goto retry;
}
return error; return error;
} }